Terials



1%. 107,600. PATENTBD SEPT. 20, 1870. H A;DUVALL;

APPABATUSFOR ROASIING AND DRYING ORBS AND OTHER MATERIALS.

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No. 107,600. PATENTED SEPT. 20, 1870.

. I A. DUVALL. APPARATUS oa ROASTING AND DRYING ORES AND OTHERMATERIALS.

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ALFRED DUVALL, or BALTIMORE, MARYLAND.

Letters Patent No. 107,600, dated September 20, 1870; antellatedSeptember 12, 187 O,

IMPROVEMENT IN. .APPARATUS FOR ROAS'IING- AND 'DRYIKG- ORE-S AND OTHERMA- TERIALS.

The Schedule referred to in these Letters Patent and making part of thesame.

the following is a full, clear, and exact description thereof, referencebeing had to the annexed drawing making a part of this specification, inwhich- Figure 1 is a cross-section in elevation; Figure 2, a plan of thecovering; Figure 3, a horizontal section on the line X, fig. 1; Figure4, a plan of the bottom of the revolving section of a hollow sphere,showing the flights or vanes; and

Figure 5', a plan of journal-box, showing openingswith valves. V

The same letters are used in all the figures to indicate the identicalparts.

M y invention relates to desulphurizing ores, drying grain, and otheranalogous uses;

My invention consists in a section. of a hollow sphere, hollow cone, orplain disk, (fastened on a hollow or solid vertical shaft,) revolvingwithina stationary vertical cylinder of iron, fire-clay, or othersuit-able niaterial, and surrounding which cylinder isan outer casing,of fire-brick, or other suitable material, rest 'ing on the same base,and rising to the same horizontal plane with the inner cylinder, andbeing built around the inner cylinder at a proper distance from thesame, thereby forming a flue aroundthe inner cylinder, and having afire-place in the flue thus formed,

on a line of a tangent from -theinner side ofthe outer casing and theoutside of the inner cylinder. The furnace and flue thus formed arecovered with iron, or other suitable material, having an escape forsmoke. The inner cylinder has also a tight covering, with acharging-funnel, with a stopper. or valve, and also an escape-pipe, forconducting off the gaseous matter to be utilized or discharged.The'heating or dryingmay he done by forcing inheated air. through ahollow shaft, or into the chamber under the revolving section of ahollow sphere or disk. 4

A further and more full description will be had by referring .to thefollowing description and accompanying drawing with letters of referencethereon.'

A is a frame-work of iron, or structure of brickwork, supporthig thebed-plate B, which is of iron or fire-clay, and on which rests thecylinder 0; also, the outer cylinder or casing of brick-work D, formingthe flue E, having a furnace or firing-placewith grate-bars.

at F.

G is a section of a hollow sphere, within the cylinder O, fastened onand revolving with the "shaft H, which shaft may be either hollow orsolid.

The section of a hollow sphere, G, is made with flights or vanes on theunder side, for the purpose of keeping up or throwing up, by centrifugalforce and.

and a blast of air, any fine particles that might fall, through betweenthe periphery of the section of a hollow sphere, G, and the cylinder 0.It is intended to' work the revolvingsection of a hollow sphere as closeas'practicable to the cylinder 0.-

lVhen'operating on material of great specific gravity, a pressure-blastof'hot or cold air may be admitted into the chamber I,:.under therevolving section of a hollow sphere,

hen the shaft H is hollow, a blast of hot or cold air may be admittedthrough the same into the cylinder 0, under the guardrplate J, andbetween the vanes K, which guard-plate J and vanes K are fastened to therevolving section of a hollow sphere, G, thereby forming a fan, for theequable distribution of the blast in the chamber formed by the cylinder0. There are also openings in the section of a hollow sphere, G, nearthe shaft H, by which air is admitted into and through the fan J K.

The journal-box L, through which the upper part of the shaft H revolves,is made with a flange with openings and valves, as shown by fig. 5,andwhich flange is fastened to the bottom of the bed-plate 13, therebyforming the chamber 1-.

f 1 In the cover of the tide E is a smoke-stack at M.

In the center of the covering of the cylinder O is a charging-funnel, N,with a valve orstopper, through. which the material to,be operated on-ischarged into the-chamber (J, falling on the guard-plate -J Also, in thecovering of the cylinder 0, at 0, there is an,

escape-pipe, throughwhich the gases, generated in the cylinder 0, arepassed oil, to be utilized or dis.- charged.

Within the cylinder 0 is a cover, P, with an open ing in the center,"theobject of which cover is-to prevent, when desulphurizing ores, the finerparticles from passing oii too readily into the gas-escape.

' Q is aguide-piece, fastened to the cylinder 0, and extending into thechamber 0, .and rising from the section of a hollow sphere, G, to thecover P,ithe object of which guide-pieceQ is to throw back, or partiallythrow back, to thecenterof the revolving section .of a'hollow sphere, G,the material being treated.

At R in the cylinder 0 is a discharge-gate or valve,

opening into the discharge-spout S, which valve is in tended to betightly fitted, and may be operated by hand, by a lever, or by means ofa screw, or two screws geared together, why an automatic arrangement ofa'screw I and screw-wheel, in connection with a combination of levers,springs, and catches, so as to open periodically and quickly, and toremain open a stated time, and

then to close instantly; and the same combination may be used to openand close the valve in the chargingfnnnel N. v

T is a beveled gear, for communicating motion to the shaft H, or motionmay be communicated to the same by any convenient arrangement.

Operation.

A fire being built in the furnace F, and raising the heat to the desiredtemperature in the cylinder 0, (or such temperature being obtained bythe forcing in of heated air,) motion is communicated to the shaft H,which causes the sect-ion of a hollow sphere, G, to revolve at suchspeed as desired. Then the materialto be operated 011 is charged throughthe funnel N, and, falling on the guard-plate J of the section of ahollow sphere, G,.is thrown out, by the centrifugal force generated bythe revolutions of said section G, to the sides of the cylinder (3. Thecurvature of the upper side of the section of a hollow sphere, G, ismade so that when the material is thrown out to the sides of thecylinder 0, it will strike at an angle of waste about forty-fivedegrees, thereby tending to raise the material higher and in a thinnerstrata, as it is Cill'- t ried around against the sides of the cylinder0 by centrifugal force, and comes in contact with the guidei piece Q, bythe reaction against which itis thrown nearly or quite back to thecenter, to go over and over again the same operation, whereby theparticles are being constantly separated in their revolutions. \Vhen thematter being treated is sufliciently operated on, the discharge-gate Ris opened, and, by the operation of centrifiigal force, the materialoperated upon is thrown out.- Thesame operation described is thenrepeated indefinitely.

What I claim as my invention, and desire to secure by Letters Patent,is-- The combination for the purposes intended, as substantially setforth in the aforegoing specification, and shown by the accompanyingdrawing, or any modification thcreof, involving the same generalprinciples of construction and operation.

ALFRED DUVALL.

Witnesses: V

LEONIDAS DUVALL, A. Lnsnm DUVALL.

